I recently bought this Heng Long tiger 1 (all plastic ver) about 2 days ago after my panther g stopped running. Fresh out of the box, all is well, but I notice a grinding noise coming from the gearbox-ish area of the tank. When I turn, accelerate, or climb too quickly, the treads cease moving and make an awful grinding sound from internally for about a half second. Then it goes and does what it was supposed to, but slows down a bit. It has a plastic gearbox, so I would image this sound coming from there. I’ve noticed a decrease in speed, even after a full charge. Are my gears wearing down or slipping off of each other? recommendations? Any advice helpful here.